321243423210143 has 4 divisors (see below), whose sum is σ = 367135340811600. Its totient is φ = 275351505608688.

The previous prime is 321243423210121. The next prime is 321243423210167. The reversal of 321243423210143 is 341012324342123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321243423210143 - 2¹⁸ = 321243422947999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321243423230143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22945958800718 + ... + 22945958800731.

It is an arithmetic number, because the mean of its divisors is an integer number (91783835202900).

Almost surely, 2^{321243423210143} is an apocalyptic number.

321243423210143 is a deficient number, since it is larger than the sum of its proper divisors (45891917601457).

321243423210143 is an equidigital number, since it uses as much as digits as its factorization.

321243423210143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45891917601456.

The product of its (nonzero) digits is 82944, while the sum is 35.

Adding to 321243423210143 its reverse (341012324342123), we get a palindrome (662255747552266).

The spelling of 321243423210143 in words is "three hundred twenty-one trillion, two hundred forty-three billion, four hundred twenty-three million, two hundred ten thousand, one hundred forty-three".